1. Species Bicosoeca accreta D.J.Hibberd, 1978
2. Species Bicosoeca acuminata A.C.Stokes, 1885
3. Species Bicosoeca ainikkii Järnefelt, 1956
4. Species Bicosoeca alaskana Hilliard
5. Species Bicosoeca campanulata Bourrelly, 1953
6. Species Bicosoeca crystallina Skuja, 1956
7. Species Bicosoeca depoucquesiana Bourrelly, 1951
8. Species Bicosoeca dissimilis A.Stokes, 1885
9. Species Bicosoeca epiphytica Hilliard, 1971
10. Species Bicosoeca exilis Penard, 1921
11. Species Bicosoeca gracilipes James-Clark, 1867
12. Species Bicosoeca irregularis (Pascher) Bourrelly
13. Species Bicosoeca kepneri B.D.Reynolds, 1927
14. Species Bicosoeca lacustris H.J.Clark, 1867
15. Species Bicosoeca leptostoma A.Stokes, 1885
16. Species Bicosoeca maris Picken, 1941
17. Species Bicosoeca mediterranea Pavillard, 1916
18. Species Bicosoeca mitra Fott, 1946
19. Species Bicosoeca multiannulata Skuja, 1948
20. Species Bicosoeca oculata Zacharias, 1894
21. Species Bicosoeca ovata Lemmermann, 1913
22. Species Bicosoeca paropsis Skuja, 1956
23. Species Bicosoeca petiolata (F.Stein) E.G.Pringsheim, 1946
24. Species Bicosoeca planctonica Kisselev, 1931
25. Species Bicosoeca pocillum Kent
26. Species Bicosoeca pontica Valkanov, 1970
27. Species Bicosoeca socialis Lauterborn, 1894
28. Species Bicosoeca starmachii Hamar, 1979
29. Species Bicosoeca subsalsa Kufferath, 1956
30. Species Bicosoeca szabadosii Hamar, 1979
31. Species Bicosoeca tenuis Kent
32. Species Bicosoeca tubiformis Skuja, 1956
33. Species Bicosoeca urceolata Fott, 1941
34. Species Bicosoeca acuminata A.Stokes, 1885 accepted as Stokesiella acuminata (A.Stokes) Lemmermann
35. Species Bicosoeca annulata (Lackey) Bourelly, 1951 accepted as Bicosoeca planctonica Kisselev, 1931 (Synonym)
36. Species Bicosoeca lepteca A.Stokes, 1885 accepted as (synonym)
37. Species Bicosoeca pocillum sensu Griessmann, 1913 accepted as Bicosoeca maris Picken, 1941 (Synonym)
38. Species Bicosoeca pulchra Hilliard, 1971 accepted as Bicosoeca epiphytica Hilliard, 1971 (Synonym)
39. Species Bicosoeca socialis Kent, 1871 accepted as Diplomitella socialis (W.S.Kent) P.C.Silva, 1960 (synonym)
40. Species Bicosoeca griessmannii Bourrelly, 1951 (uncertain)
41. Species Bicosoeca lauterbornei Authority unknown (uncertain, uncertain taxonomic status subjected to verification)
42. Species Bicosoeca longipes A.Stokes, 1885 (uncertain, uncertain taxonomic status subjected to verification)
43. Species Bicosoeca mignotii Moestrup, Thomsen & Hibberd (uncertain)

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